am79c930.c revision 1.2
1 /* $NetBSD: am79c930.c,v 1.2 1999/11/05 05:13:36 sommerfeld Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Bill Sommerfeld 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Am79c930 chip driver. 41 * 42 * This is used by the awi driver to use the shared 43 * memory attached to the 79c930 to communicate with the firmware running 44 * in the 930's on-board 80188 core. 45 * 46 * The 79c930 can be mapped into just I/O space, or also have a 47 * memory mapping; the mapping must be set up by the bus front-end 48 * before am79c930_init is called. 49 */ 50 51 /* 52 * operations: 53 * 54 * read_8, read_16, read_32, read_64, read_bytes 55 * write_8, write_16, write_32, write_64, write_bytes 56 * (two versions, depending on whether memory-space or i/o space is in use). 57 * 58 * interrupt E.C. 59 * start isr 60 * end isr 61 */ 62 63 #include <sys/param.h> 64 #include <sys/systm.h> 65 #include <sys/kernel.h> 66 #include <sys/device.h> 67 68 #include <machine/cpu.h> 69 #include <machine/bus.h> 70 #include <machine/intr.h> 71 72 #include <dev/ic/am79c930reg.h> 73 #include <dev/ic/am79c930var.h> 74 75 #define AM930_DELAY(x) /*nothing*/; 76 77 void am79c930_regdump __P((struct am79c930_softc *sc)); 78 79 static void io_write_1 __P((struct am79c930_softc *, u_int32_t, u_int8_t)); 80 static void io_write_2 __P((struct am79c930_softc *, u_int32_t, u_int16_t)); 81 static void io_write_4 __P((struct am79c930_softc *, u_int32_t, u_int32_t)); 82 static void io_write_bytes __P((struct am79c930_softc *, u_int32_t, u_int8_t *, size_t)); 83 84 static u_int8_t io_read_1 __P((struct am79c930_softc *, u_int32_t)); 85 static u_int16_t io_read_2 __P((struct am79c930_softc *, u_int32_t)); 86 static u_int32_t io_read_4 __P((struct am79c930_softc *, u_int32_t)); 87 static void io_read_bytes __P((struct am79c930_softc *, u_int32_t, u_int8_t *, size_t)); 88 89 static void mem_write_1 __P((struct am79c930_softc *, u_int32_t, u_int8_t)); 90 static void mem_write_2 __P((struct am79c930_softc *, u_int32_t, u_int16_t)); 91 static void mem_write_4 __P((struct am79c930_softc *, u_int32_t, u_int32_t)); 92 static void mem_write_bytes __P((struct am79c930_softc *, u_int32_t, u_int8_t *, size_t)); 93 94 static u_int8_t mem_read_1 __P((struct am79c930_softc *, u_int32_t)); 95 static u_int16_t mem_read_2 __P((struct am79c930_softc *, u_int32_t)); 96 static u_int32_t mem_read_4 __P((struct am79c930_softc *, u_int32_t)); 97 static void mem_read_bytes __P((struct am79c930_softc *, u_int32_t, u_int8_t *, size_t)); 98 99 static struct am79c930_ops iospace_ops = { 100 io_write_1, 101 io_write_2, 102 io_write_4, 103 io_write_bytes, 104 io_read_1, 105 io_read_2, 106 io_read_4, 107 io_read_bytes 108 }; 109 110 struct am79c930_ops memspace_ops = { 111 mem_write_1, 112 mem_write_2, 113 mem_write_4, 114 mem_write_bytes, 115 mem_read_1, 116 mem_read_2, 117 mem_read_4, 118 mem_read_bytes 119 }; 120 121 static void io_write_1 (sc, off, val) 122 struct am79c930_softc *sc; 123 u_int32_t off; 124 u_int8_t val; 125 { 126 /* XXX bank-switching? */ 127 AM930_DELAY(1); 128 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, 129 ((off>>8)& 0x7f)); 130 AM930_DELAY(1); 131 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff)); 132 AM930_DELAY(1); 133 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA, val); 134 AM930_DELAY(1); 135 } 136 137 static void io_write_2 (sc, off, val) 138 struct am79c930_softc *sc; 139 u_int32_t off; 140 u_int16_t val; 141 { 142 io_write_1(sc, off, val & 0xff); 143 io_write_1(sc, off+1, (val >> 8) & 0xff); 144 } 145 146 static void io_write_4 (sc, off, val) 147 struct am79c930_softc *sc; 148 u_int32_t off; 149 u_int32_t val; 150 { 151 /* XXX higher offset values needed for bank-switching! */ 152 io_write_1(sc, off, val & 0xff); 153 io_write_1(sc, off+1, (val >> 8) & 0xff); 154 io_write_1(sc, off+2, (val >> 16) & 0xff); 155 io_write_1(sc, off+3, (val >> 24) & 0xff); 156 } 157 158 static void io_write_bytes (sc, off, ptr, len) 159 struct am79c930_softc *sc; 160 u_int32_t off; 161 u_int8_t *ptr; 162 size_t len; 163 { 164 int i; 165 /* XXX higher offset values needed for bank-switching! */ 166 167 for (i=0; i<len; i++) 168 io_write_1 (sc, off+i, ptr[i]); 169 } 170 171 static u_int8_t io_read_1 (sc, off) 172 struct am79c930_softc *sc; 173 u_int32_t off; 174 { 175 u_int8_t val; 176 177 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, 178 ((off>>8)& 0x7f)); 179 AM930_DELAY(1); 180 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff)); 181 AM930_DELAY(1); 182 val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA); 183 AM930_DELAY(1); 184 return val; 185 } 186 187 static u_int16_t io_read_2 (sc, off) 188 struct am79c930_softc *sc; 189 u_int32_t off; 190 { 191 return io_read_1 (sc, off) | 192 (io_read_1 (sc, off+1) << 8); 193 } 194 195 static u_int32_t io_read_4 (sc, off) 196 struct am79c930_softc *sc; 197 u_int32_t off; 198 { 199 /* XXX bank-switching? */ 200 return io_read_1 (sc, off) | 201 (io_read_1 (sc, off+1) << 8) | 202 (io_read_1 (sc, off+2) << 16) | 203 (io_read_1 (sc, off+3) << 24); 204 } 205 206 static void io_read_bytes (sc, off, ptr, len) 207 struct am79c930_softc *sc; 208 u_int32_t off; 209 u_int8_t *ptr; 210 size_t len; 211 { 212 int i; 213 214 for (i=0; i<len; i++) 215 ptr[i] = io_read_1(sc, off+i); 216 } 217 218 219 220 static void mem_write_1 (sc, off, val) 221 struct am79c930_softc *sc; 222 u_int32_t off; 223 u_int8_t val; 224 { 225 /* XXX higher offset values needed for bank-switching! */ 226 bus_space_write_1(sc->sc_memt, sc->sc_memh, off, val); 227 } 228 229 static void mem_write_2 (sc, off, val) 230 struct am79c930_softc *sc; 231 u_int32_t off; 232 u_int16_t val; 233 { 234 /* XXX higher offset values needed for bank-switching! */ 235 bus_space_write_1(sc->sc_memt, sc->sc_memh, off, val & 0xff); 236 bus_space_write_1(sc->sc_memt, sc->sc_memh, off+1, (val >> 8) & 0xff); 237 } 238 239 static void mem_write_4 (sc, off, val) 240 struct am79c930_softc *sc; 241 u_int32_t off; 242 u_int32_t val; 243 { 244 /* XXX higher offset values needed for bank-switching! */ 245 bus_space_write_1(sc->sc_memt, sc->sc_memh, off, val & 0xff); 246 bus_space_write_1(sc->sc_memt, sc->sc_memh, off+1, (val >> 8) & 0xff); 247 bus_space_write_1(sc->sc_memt, sc->sc_memh, off+2, (val >> 16) & 0xff); 248 bus_space_write_1(sc->sc_memt, sc->sc_memh, off+3, (val >> 24) & 0xff); 249 } 250 251 static void mem_write_bytes (sc, off, ptr, len) 252 struct am79c930_softc *sc; 253 u_int32_t off; 254 u_int8_t *ptr; 255 size_t len; 256 { 257 int i; 258 /* XXX higher offset values needed for bank-switching! */ 259 260 for (i=0; i<len; i++) 261 bus_space_write_1 (sc->sc_memt, sc->sc_memh, off+i, ptr[i]); 262 } 263 264 265 static u_int8_t mem_read_1 (sc, off) 266 struct am79c930_softc *sc; 267 u_int32_t off; 268 { 269 /* XXX higher offset values needed for bank-switching! */ 270 return bus_space_read_1(sc->sc_memt, sc->sc_memh, off); 271 } 272 273 static u_int16_t mem_read_2 (sc, off) 274 struct am79c930_softc *sc; 275 u_int32_t off; 276 { 277 /* XXX higher offset values needed for bank-switching! */ 278 return 279 bus_space_read_1(sc->sc_memt, sc->sc_memh, off) | 280 (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) <<8); 281 } 282 283 static u_int32_t mem_read_4 (sc, off) 284 struct am79c930_softc *sc; 285 u_int32_t off; 286 { 287 /* XXX higher offset values needed for bank-switching! */ 288 return 289 bus_space_read_1(sc->sc_memt, sc->sc_memh, off) | 290 (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) <<8)| 291 (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+2) <<16) | 292 (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+3) <<24); 293 } 294 295 296 297 static void mem_read_bytes (sc, off, ptr, len) 298 struct am79c930_softc *sc; 299 u_int32_t off; 300 u_int8_t *ptr; 301 size_t len; 302 { 303 int i; 304 305 /* XXX higher offset values needed for bank-switching! */ 306 307 for (i=0; i<len; i++) 308 ptr[i] = bus_space_read_1(sc->sc_memt, sc->sc_memh, off+i); 309 } 310 311 312 313 314 /* 315 * Set bits in GCR. 316 */ 317 318 void am79c930_gcr_setbits (sc, bits) 319 struct am79c930_softc *sc; 320 u_int8_t bits; 321 { 322 u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR); 323 324 gcr |= bits; 325 326 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr); 327 } 328 329 /* 330 * Clear bits in GCR. 331 */ 332 333 void am79c930_gcr_clearbits (sc, bits) 334 struct am79c930_softc *sc; 335 u_int8_t bits; 336 { 337 u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR); 338 339 gcr &= ~bits; 340 341 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr); 342 } 343 344 u_int8_t am79c930_gcr_read (sc) 345 struct am79c930_softc *sc; 346 { 347 return bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR); 348 } 349 350 #if 0 351 void am79c930_regdump (sc) 352 struct am79c930_softc *sc; 353 { 354 u_int8_t buf[8]; 355 int i; 356 357 AM930_DELAY(5); 358 for (i=0; i<8; i++) { 359 buf[i] = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, i); 360 AM930_DELAY(5); 361 } 362 printf("am79c930: regdump:"); 363 for (i=0; i<8; i++) { 364 printf(" %02x", buf[i]); 365 } 366 printf("\n"); 367 } 368 #endif 369 370 void am79c930_chip_init (sc, how) 371 struct am79c930_softc *sc; 372 { 373 /* zero the bank select register, and leave it that way.. */ 374 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_BSS, 0); 375 if (how) 376 sc->sc_ops = &memspace_ops; 377 else 378 sc->sc_ops = &iospace_ops; 379 } 380 381 382
Indexes created Tue Sep 23 14:10:03 GMT 2025